lsns: Fix parser for /proc/<pid>/stat which is including space in comm

lsns: Fix parser for /proc/<pid>/stat which is including space in comm

For example, child process of spamd has

    32031 (spamd child) S 32026 32026 32026 0 -1 4210752 338 0 0 0 ...

fscanf("%d %*s %c %d*[^\n]") in read_process() can't parse above as we
expected, because %s only skips non-whitespace. I.e. it parses like
following,

    32031 (spamd child) S 32026 32026 32026 0 -1 4210752 338 0 0 0 ...
    +---+ +----+ +
      %d    %*s  %c

and returns 2 (pid=32031, state=c).

This fixes it by skipping task->comm part manually.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>